$\left(x+2\right)\left(x+4\right)+\left(x+2\right)\left(x-1\right)$
$\int\left(8e^{cost}sint\right)dt$
$\frac{8y^3-5y}{y+1}$
$2x+1\:+\:2x-1\:are$
$\frac{1}{1+x^9}$
$\frac{\left(4x^3-13x^2+8x-15\right)}{\left(4x^2-x+5\right)}$
$\frac{dy}{dx}=\frac{1}{sec^2\:y}$
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